Looks like you are trying to use a C compiler together with C++ options.

Did you configure quazip correctly? Maybe the build system is buggy, too? I doubt there are many testers on symbian already... I suggest to contact the quazip developers, maybe they have an idea. At least they should be able to tell you whether there are known users of quazip on symbian (which would suggest you doing something wrong) or not (which makes it more likely that the build system might not be able to cope with symbian yet).